Peter weber



(No Model.)

P. WEBER.

ADJUSTABLE REAMER.

No. 470,962. Patented Mar.'15, 1892.

PETER WEBER, OF SOHENEGTADY, NE\V YORK.

ADJUSTABLE REAM ER.

SPECIFICATION forming part of Letters Patent No. 470,962, dated March15, 1892.

Application filed December 29, 1891- Serial No. 416,434. (No model.)

To all whom, it may concern.-

Be it known that I, PETER VVEBER, a citizen of the United States,residing at Schenectady, county of Schenectady, and State of New York,have invented certain new and useful Improvements in Adjustable Reamers,fully described and represented in the following specification and theaccompanying drawings,forming a part of the same.

The object of the present invention is to provide an improved adjustablereamer or tap of that class employing a body or holder having inclinedcutter-seats and cutters with similarly-inclined bases, so that the sizeof the reamer or tap may be adjusted by moving the cutters up or downthe incline; and my invention consists, broadly, in the combination,with such a body and cutters, of an adjusting-nut screw-threaded withoutthe cutters and moving the latter longitudinally of the body by itsrotation, while itself held. from longitudinal movement, and in certainspecific constructions embodying my invention in its preferred form, allof which will be particularly described in the following specification,and pointed out in the claims.

In the accompanying drawings, forming a part of this specification, andin which I have shown a construction embodying my invention in itspreferred form and certain modifications thereof, Figure 1 is alongitudinal central section of my improved reamer in its preferredform. Fig. 2 is an end view of the same; Fig. 3 is a cross-section onthe line 3 of Fig. 1. Figs. at and 5 are views similar to Fig. 1,showing slightly-modified constructions, Fig. 5 showing my invention asapplied to a tap.

In the drawings, A is the body of the reamer, provided with inclinedcutter-seats formed by grooves 1, extending longitudinally of theholder, as usual, the construction being shown as employing six cutters,although it will be understood that any other number may be used. In thegrooves 1 slide the cutters B, the bases 2 of which, as usual, areinclined at the same angle as the cutter-seats. These cutters areprovided, also, with shanks 3, preferably of less height than thecutters, so as to reduce the size of the reamer as far as possible, andthe outer surfaces of these shanks are parallel with the bases 2 andscrewthreaded on their outer surfaces.

Surrounding the shanks 3 is a nut O, which is provided with an internalscrew-thread parallel withand engagingthe screw-threaded surfaces of theshanks 3, so that by the rotation of the nut O the cutters are movedlongitudinally of the body. The nut 0 maybe held from movementlongitudinally of the body during its rotation in any suitable manner.In the simple construction shown in Fig. 1 the body is provided with ashoulder 5, which serves to limit the movement of the nut in onedirection, and a set-nut D, screwed onto a reduced portion of the body,holds the nut against movement in the opposite direction. By unscrewingthe nut Dand holding the cutters B the nut C may be unscrewed from theshanks of the cutters and removed by slipping it over the reduced innerend of the body.

It is evident that other means may readily be devised for holding thenut C in position during rotation. Thus in Fig. 4 I have shown aconstruction similar to that described, except that a sleeve E, securedby a set-screw 6,

is substituted for the set-nut D. In Fig. 5 a

similar construction is shown, except that the nut is held in positionby an arm F, removably secured thereto and provided with a stud runningin a groove 7 inside the line of movement of the cutters. By removingthe arm F the adj usting-nut C may be readily removed, as beforedescribed.

The constructions shown are applicable also to other tools than reamers.Thus an adjustable tap may readily be made by threading the cutters B,as shown in Fig. 5.

What I claim is- 1. The combination, with a body having inclinedcutter-seats and cutters having correspondingly-inclined bases andscrew-threaded portions, of a nut screw threaded on the threadedportions of the cutters and held from movement longitudinally of thebody, while free to rotate for adjust-ing the cutters, substantially asdescribed.

2. The combination, with a body having inclined cutter-seats and cuttershaving correspondingly-inclined bases and screw-threaded portionsparallel therewith, of a nut having its screw-threaded surface parallelwit-h and against movement longitudinally of the body, while permittingit to rotate for adjusting the cutters, substantially as described.

I11 testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

PETER WEBER.

\Vitnesses:

THEo. E. BUTTON, GEO. O. REILLEY.

